mirror of https://github.com/freetype/freetype
Formatting and ChangeLog additions for previous commits.
This commit is contained in:
Werner Lemberg
parent
c37c087382
commit
93771d619f
80
ChangeLog
80
ChangeLog
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@ -1,38 +1,88 @@
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2021-07-15 Ben Wagner <bungeman@chromium.org>
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* src/smooth/ftgrays.c: Guard inclusion of `emmintrin.h`.
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Guard inclusion of `emmintrin.h` with `#ifdef __SSE2__`. The gcc
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version of this header, `xmmintrin.h`, and `mmintrin.h` check that
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the appropriate defines are set before defining anything (are
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internally guarded). However, the clang versions of these includes
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are not internally guarded. As a result of this, externally guard
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the inclusion of these headers.
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2021-07-15 David Turner <david@freetype.org>
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[smooth] Implement Bezier quadratic arc flattenning with DDA
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[smooth] Implement Bézier quadratic arc flattening with DDA.
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Benchmarking shows that this provides a very slighty performance
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boost when rendering fonts with lots of quadratic bezier arcs,
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boost when rendering fonts with lots of quadratic Bézier arcs,
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compared to the recursive arc splitting, but only when SSE2 is
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available, or on 64-bit CPUs.
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On a 2017 Core i5-7300U CPU on Linux/x86_64:
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ftbench -p -s10 -t5 -cb DroidSansFallbackFull.ttf
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Before: 4.033 us/op (best of 5 runs for all numbers)
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After: 3.876 us/op
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ftbench -p -s60 -t5 -cb DroidSansFallbackFull.ttf
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Before: 13.467 us/op
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After: 13.385 us/op
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* src/smooth/ftgrays.c (gray_render_conic): New implementation
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based on DDA and optionally SSE2.
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2021-07-15 David Turner <david@freetype.org>
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[smooth] Minor speedup to smooth rasterizer
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[smooth] Minor speedup to smooth rasterizer.
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This speeds up the smooth rasterizer by avoiding a conditional
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This speeds up the smooth rasterizer by avoiding conditional
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branches in the hot path.
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* src/smooth/ftgrays.c: Define a null cell used to both as a
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sentinel for all linked-lists, and to accumulate coverage and
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area values for "out-of-bounds" cell positions without a
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conditional check.
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- Define a fixed 'null cell', which will be pointed to whenever the
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current cell is outside of the current target region. This avoids
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a `ras.cell != NULL` check in the `FT_INTEGRATE` macro.
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- Also use the null cell as a sentinel at the end of all `ycells`
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linked-lists, by setting its x coordinate to `INT_MAX`. This
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avoids a `if (!cell)` check in `gray_set_cell` as well.
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- Slightly change the worker struct fields to perform a little less
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operations during rendering.
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Example results (on a 2013 Corei5-3337U CPU)
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out/ftbench -p -s10 -t5 -bc DroidSansFallbackFull.ttf
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Before: 5.472 us/op
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After: 5.275 us/op
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out/ftbench -p -s60 -t5 -bc DroidSansFallbackFull.ttf
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Before: 17.988 us/op
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After: 17.389 us/op
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* src/smooth/ftgrays.c (grat_TWorker): Replace `num_cells` field with
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`cell_free` and `cell_limit`.
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(NULL_CELL_PTR, CELL_MAX_X_VALUE, CELL_IS_NULL): New macros.
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(gray_dump_cells, gray_set_cell, gray_sweep, gray_sweep_direct,
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gray_convert_glyph_inner, gray_convert_glyph): Updated.
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2021-07-15 David Turner <david@freetype.org>
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Replaces download-test-fonts.sh with download-test-fonts.py which
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does the same work, and also avoids downloading anything if the
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files are already installed with the right content.
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[tests] Rewrite download script in Python3.
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Now uses the first 8 byte of each file's sha256 hash for the digest.
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This commit replaces the bash script with a Python script that does
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the same work, plus avoiding to download anything if the files are
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already installed with the right content.
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* tests/scripts/download-test-fonts.sh: Removed
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* tests/scripts/download-test-fonts.py: New script
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* tests/README.md: Updated
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We now use the first 8 bytes of each file's sha256 hash for the
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digest.
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* tests/scripts/download-test-fonts.sh: Removed.
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* tests/scripts/download-test-fonts.py: New script.
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* tests/README.md: Updated.
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2021-07-15 Alex Richardson <Alexander.Richardson@cl.cam.ac.uk>
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@ -487,8 +487,8 @@ typedef ptrdiff_t FT_PtrDist;
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PCell cell_free; /* call allocation next free slot */
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PCell cell_limit; /* cell allocation limit */
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PCell* ycells; /* array of cell linked-lists, one per */
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/* vertical coordinate in the current band. */
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PCell* ycells; /* array of cell linked-lists; one per */
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/* vertical coordinate in the current band */
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PCell cells; /* cell storage area */
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FT_PtrDist max_cells; /* cell storage capacity */
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@ -513,19 +513,21 @@ typedef ptrdiff_t FT_PtrDist;
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static gray_TWorker ras;
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#endif
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/* Return a pointer to the "null cell", used as a sentinel at the end */
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/* of all ycells[] linked lists. Its x coordinate should be maximal */
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/* to ensure no NULL checks are necessary when looking for an insertion */
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/* point in gray_set_cell(). Other loops should check the cell pointer */
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/* with CELL_IS_NULL() to detect the end of the list. */
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#define NULL_CELL_PTR(ras) (ras).cells
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/*
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* Return a pointer to the 'null cell', used as a sentinel at the end of
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* all `ycells` linked lists. Its x coordinate should be maximal to
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* ensure no NULL checks are necessary when looking for an insertion point
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* in `gray_set_cell`. Other loops should check the cell pointer with
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* CELL_IS_NULL() to detect the end of the list.
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*/
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#define NULL_CELL_PTR( ras ) (ras).cells
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/* The |x| value of the null cell. Must be the largest possible */
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/* integer value stored in a TCell.x field. */
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/* The |x| value of the null cell. Must be the largest possible */
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/* integer value stored in a `TCell.x` field. */
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#define CELL_MAX_X_VALUE INT_MAX
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/* Return true iff |cell| points to the null cell. */
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#define CELL_IS_NULL(cell) ((cell)->x == CELL_MAX_X_VALUE)
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/* Return true iff |cell| points to the null cell. */
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#define CELL_IS_NULL( cell ) ( (cell)->x == CELL_MAX_X_VALUE )
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#define FT_INTEGRATE( ras, a, b ) \
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@ -556,7 +558,7 @@ typedef ptrdiff_t FT_PtrDist;
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printf( "%3d:", y );
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for ( ; !CELL_IS_NULL(cell); cell = cell->next )
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for ( ; !CELL_IS_NULL( cell ); cell = cell->next )
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printf( " (%3d, c:%4d, a:%6d)",
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cell->x, cell->cover, cell->area );
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printf( "\n" );
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@ -584,9 +586,11 @@ typedef ptrdiff_t FT_PtrDist;
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/* Note that if a cell is to the left of the clipping region, it is */
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/* actually set to the (min_ex-1) horizontal position. */
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TCoord ey_index = ey - ras.min_ey;
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TCoord ey_index = ey - ras.min_ey;
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if ( ey_index < 0 || ey_index >= ras.count_ey || ex >= ras.max_ex )
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ras.cell = NULL_CELL_PTR(ras);
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ras.cell = NULL_CELL_PTR( ras );
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else
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{
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PCell* pcell = ras.ycells + ey_index;
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@ -610,7 +614,7 @@ typedef ptrdiff_t FT_PtrDist;
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/* insert new cell */
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cell = ras.cell_free++;
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if (cell >= ras.cell_limit)
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if ( cell >= ras.cell_limit )
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ft_longjmp( ras.jump_buffer, 1 );
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cell->x = ex;
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@ -978,6 +982,7 @@ typedef ptrdiff_t FT_PtrDist;
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}
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gray_set_cell( RAS_VAR_ ex1, ey1 );
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} while ( ex1 != ex2 || ey1 != ey2 );
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}
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@ -987,30 +992,37 @@ typedef ptrdiff_t FT_PtrDist;
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FT_INTEGRATE( ras, fy2 - fy1, fx1 + fx2 );
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End:
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ras.x = to_x;
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ras.y = to_y;
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ras.x = to_x;
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ras.y = to_y;
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}
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#endif
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/* Benchmarking shows that using DDA to flatten the quadratic bezier
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* arcs is slightly faster in the following cases:
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*
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* - When the host CPU is 64-bit.
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* - When SSE2 SIMD registers and instructions are available (even on x86).
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*
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* For other cases, using binary splits is actually slightly faster.
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*/
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#if defined(__SSE2__) || defined(__x86_64__) || defined(__aarch64__) || defined(_M_AMD64) || defined(_M_ARM64)
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#define BEZIER_USE_DDA 1
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/*
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* Benchmarking shows that using DDA to flatten the quadratic Bézier arcs
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* is slightly faster in the following cases:
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*
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* - When the host CPU is 64-bit.
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* - When SSE2 SIMD registers and instructions are available (even on
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* x86).
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*
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* For other cases, using binary splits is actually slightly faster.
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*/
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#if defined( __SSE2__ ) || \
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defined( __x86_64__ ) || \
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defined( __aarch64__ ) || \
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defined( _M_AMD64 ) || \
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defined( _M_ARM64 )
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# define BEZIER_USE_DDA 1
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#else
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#define BEZIER_USE_DDA 0
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# define BEZIER_USE_DDA 0
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#endif
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#if BEZIER_USE_DDA
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#ifdef __SSE2__
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#include <emmintrin.h>
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# include <emmintrin.h>
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#endif
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static void
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@ -1058,8 +1070,8 @@ typedef ptrdiff_t FT_PtrDist;
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{
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dx >>= 2;
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shift += 1;
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}
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while (dx > ONE_PIXEL / 4);
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} while ( dx > ONE_PIXEL / 4 );
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/*
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* The (P0,P1,P2) arc equation, for t in [0,1] range:
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@ -1102,12 +1114,17 @@ typedef ptrdiff_t FT_PtrDist;
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* Q << 32 = (2 * B << (32 - N)) + (A << (32 - N - N))
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* = (B << (33 - N)) + (A << (32 - N - N))
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*/
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#ifdef __SSE2__
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/* Experience shows that for small shift values, SSE2 is actually slower. */
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if (shift > 2) {
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union {
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struct { FT_Int64 ax, ay, bx, by; } i;
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struct { __m128i a, b; } vec;
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/* Experience shows that for small shift values, */
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/* SSE2 is actually slower. */
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if ( shift > 2 )
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{
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union
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{
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struct { FT_Int64 ax, ay, bx, by; } i;
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struct { __m128i a, b; } vec;
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} u;
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u.i.ax = p0.x + p2.x - 2 * p1.x;
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@ -1138,10 +1155,11 @@ typedef ptrdiff_t FT_PtrDist;
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p = _mm_add_epi64(p, q);
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q = _mm_add_epi64(q, r);
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_mm_store_si128(&v.vec, p);
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_mm_store_si128( &v.vec, p );
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gray_render_line( RAS_VAR_ v.i.px_hi, v.i.py_hi);
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gray_render_line( RAS_VAR_ v.i.px_hi, v.i.py_hi );
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}
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return;
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}
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#endif /* !__SSE2__ */
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@ -1167,13 +1185,15 @@ typedef ptrdiff_t FT_PtrDist;
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qx += rx;
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qy += ry;
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gray_render_line( RAS_VAR_ (FT_Pos)(px >> 32), (FT_Pos)(py >> 32));
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gray_render_line( RAS_VAR_ (FT_Pos)( px >> 32 ),
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(FT_Pos)( py >> 32 ) );
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}
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}
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#else /* !BEZIER_USE_DDA */
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/* Note that multiple attempts to speed up the function below
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/*
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* Note that multiple attempts to speed up the function below
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* with SSE2 intrinsics, using various data layouts, have turned
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* out to be slower than the non-SIMD code below.
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*/
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@ -1264,12 +1284,14 @@ typedef ptrdiff_t FT_PtrDist;
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#endif /* !BEZIER_USE_DDA */
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/* For cubic bezier, binary splits are still faster than DDA
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/*
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* For cubic Bézier, binary splits are still faster than DDA
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* because the splits are adaptive to how quickly each sub-arc
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* approaches their chord trisection points.
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*
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* It might be useful to experiment with SSE2 to speed up
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* gray_split_cubic() though.
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* `gray_split_cubic`, though.
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*/
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static void
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gray_split_cubic( FT_Vector* base )
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@ -1361,6 +1383,7 @@ typedef ptrdiff_t FT_PtrDist;
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}
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}
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static int
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gray_move_to( const FT_Vector* to,
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gray_PWorker worker )
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@ -1428,7 +1451,7 @@ typedef ptrdiff_t FT_PtrDist;
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unsigned char* line = ras.target.origin - ras.target.pitch * y;
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for ( ; !CELL_IS_NULL(cell); cell = cell->next )
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for ( ; !CELL_IS_NULL( cell ); cell = cell->next )
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{
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if ( cover != 0 && cell->x > x )
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{
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@ -1476,7 +1499,7 @@ typedef ptrdiff_t FT_PtrDist;
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TArea area;
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for ( ; !CELL_IS_NULL(cell); cell = cell->next )
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for ( ; !CELL_IS_NULL( cell ); cell = cell->next )
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{
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if ( cover != 0 && cell->x > x )
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{
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@ -1898,19 +1921,19 @@ typedef ptrdiff_t FT_PtrDist;
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/* memory management */
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n = ( height * sizeof ( PCell ) + sizeof ( TCell ) - 1 ) / sizeof ( TCell );
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ras.cells = buffer + n;
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ras.max_cells = (FT_PtrDist)( FT_MAX_GRAY_POOL - n );
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ras.cells = buffer + n;
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ras.max_cells = (FT_PtrDist)( FT_MAX_GRAY_POOL - n );
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ras.cell_limit = ras.cells + ras.max_cells;
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ras.ycells = (PCell*)buffer;
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ras.ycells = (PCell*)buffer;
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/* Initialize the null cell is at the start of the 'cells' array. */
|
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/* Note that this requires ras.cell_free initialization to skip */
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/* over the first entry in the array. */
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PCell null_cell = NULL_CELL_PTR(ras);
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null_cell->x = CELL_MAX_X_VALUE;
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null_cell->area = 0;
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null_cell->cover = 0;
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null_cell->next = NULL;;
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/* Initialize the null cell at the start of the `cells` array. */
|
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/* Note that this requires `ras.cell_free` initialization to skip */
|
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/* over the first entry in the array. */
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PCell null_cell = NULL_CELL_PTR( ras );
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null_cell->x = CELL_MAX_X_VALUE;
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null_cell->area = 0;
|
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null_cell->cover = 0;
|
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null_cell->next = NULL;;
|
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|
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for ( y = yMin; y < yMax; )
|
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{
|
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|
|
@ -1928,7 +1951,8 @@ typedef ptrdiff_t FT_PtrDist;
|
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TCoord w;
|
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int error;
|
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|
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for (w = 0; w < width; ++w)
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|
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for ( w = 0; w < width; ++w )
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ras.ycells[w] = null_cell;
|
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|
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ras.cell_free = ras.cells + 1; /* NOTE: Skip over the null cell. */
|
||||
|
|
|
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|
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@ -1,8 +1,7 @@
|
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#!/usr/bin/env python3
|
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|
||||
"""Download test fonts used by the FreeType regression test programs.
|
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These will be copied to $FREETYPE/tests/data/ by default.
|
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"""
|
||||
"""Download test fonts used by the FreeType regression test programs. These
|
||||
will be copied to $FREETYPE/tests/data/ by default."""
|
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|
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import argparse
|
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import collections
|
||||
|
|
@ -15,8 +14,8 @@ import zipfile
|
|||
|
||||
from typing import Callable, List, Optional, Tuple
|
||||
|
||||
# The list of download items describing the font files to install.
|
||||
# Each download item is a dictionary with one of the following schemas:
|
||||
# The list of download items describing the font files to install. Each
|
||||
# download item is a dictionary with one of the following schemas:
|
||||
#
|
||||
# - File item:
|
||||
#
|
||||
|
|
@ -28,8 +27,8 @@ from typing import Callable, List, Optional, Tuple
|
|||
# install_name
|
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# Type: file name string
|
||||
# Required: No
|
||||
# Description: Installation name for the font file, only provided if it
|
||||
# must be different from the original URL's basename.
|
||||
# Description: Installation name for the font file, only provided if
|
||||
# it must be different from the original URL's basename.
|
||||
#
|
||||
# hex_digest
|
||||
# Type: hexadecimal string
|
||||
|
|
@ -39,7 +38,7 @@ from typing import Callable, List, Optional, Tuple
|
|||
# - Zip items:
|
||||
#
|
||||
# These items correspond to one or more font files that are embedded in a
|
||||
# remote zip archive. Each entry has the following fields:
|
||||
# remote zip archive. Each entry has the following fields:
|
||||
#
|
||||
# zip_url
|
||||
# Type: URL string.
|
||||
|
|
@ -52,23 +51,25 @@ from typing import Callable, List, Optional, Tuple
|
|||
# Description: A list of entries describing a single font file to be
|
||||
# extracted from the archive
|
||||
#
|
||||
# Apart from that, some schemas are used for dictionaries used inside download
|
||||
# items:
|
||||
# Apart from that, some schemas are used for dictionaries used inside
|
||||
# download items:
|
||||
#
|
||||
# - File entries:
|
||||
#
|
||||
# These are dictionaries describing a single font file to extract from an archive.
|
||||
# These are dictionaries describing a single font file to extract from an
|
||||
# archive.
|
||||
#
|
||||
# filename
|
||||
# Type: file path string
|
||||
# Required: Yes
|
||||
# Description: Path of source file, relative to the archive's top-level directory.
|
||||
# Description: Path of source file, relative to the archive's
|
||||
# top-level directory.
|
||||
#
|
||||
# install_name
|
||||
# Type: file name string
|
||||
# Required: No
|
||||
# Description: Installation name for the font file, only provided if it must be
|
||||
# different from the original filename value.
|
||||
# Description: Installation name for the font file; only provided if
|
||||
# it must be different from the original filename value.
|
||||
#
|
||||
# hex_digest
|
||||
# Type: hexadecimal string
|
||||
|
|
@ -90,7 +91,8 @@ _DOWNLOAD_ITEMS = [
|
|||
|
||||
|
||||
def digest_data(data: bytes):
|
||||
"""Compute the digest of a given input byte string, which are the first 8 bytes of its sha256 hash."""
|
||||
"""Compute the digest of a given input byte string, which are the first
|
||||
8 bytes of its sha256 hash."""
|
||||
m = hashlib.sha256()
|
||||
m.update(data)
|
||||
return m.digest()[:8]
|
||||
|
|
@ -155,14 +157,16 @@ def extract_file_from_zip_archive(
|
|||
|
||||
Args:
|
||||
archive: Input ZipFile objec.
|
||||
archive_name: Archive name or URL, only used to generate a human-readable error
|
||||
message.
|
||||
archive_name: Archive name or URL, only used to generate a
|
||||
human-readable error message.
|
||||
|
||||
filepath: Input filepath in archive.
|
||||
expected_digest: Optional digest for the file.
|
||||
Returns:
|
||||
A new File instance corresponding to the extract file.
|
||||
Raises:
|
||||
ValueError if expected_digest is not None and does not match the extracted file.
|
||||
ValueError if expected_digest is not None and does not match the
|
||||
extracted file.
|
||||
"""
|
||||
file = archive.open(filepath)
|
||||
if expected_digest is not None:
|
||||
|
|
@ -181,7 +185,8 @@ def _get_and_install_file(
|
|||
force_download: bool,
|
||||
get_content: Callable[[], bytes],
|
||||
) -> bool:
|
||||
if not force_download and hex_digest is not None and os.path.exists(install_path):
|
||||
if not force_download and hex_digest is not None \
|
||||
and os.path.exists(install_path):
|
||||
with open(install_path, "rb") as f:
|
||||
content: bytes = f.read()
|
||||
if bytes.fromhex(hex_digest) == digest_data(content):
|
||||
|
|
@ -200,14 +205,15 @@ def download_and_install_item(
|
|||
Args:
|
||||
item: Download item as a dictionary, see above for schema.
|
||||
install_dir: Installation directory.
|
||||
force_download: Set to True to force download and installation, even if
|
||||
the font file is already installed with the right content.
|
||||
force_download: Set to True to force download and installation, even
|
||||
if the font file is already installed with the right content.
|
||||
|
||||
Returns:
|
||||
A list of (install_name, status) tuples, where 'install_name' is the file's
|
||||
installation name under 'install_dir', and 'status' is a boolean that is True
|
||||
to indicate that the file was downloaded and installed, or False to indicate that
|
||||
the file is already installed with the right content.
|
||||
A list of (install_name, status) tuples, where 'install_name' is the
|
||||
file's installation name under 'install_dir', and 'status' is a
|
||||
boolean that is True to indicate that the file was downloaded and
|
||||
installed, or False to indicate that the file is already installed
|
||||
with the right content.
|
||||
"""
|
||||
if "file_url" in item:
|
||||
file_url = item["file_url"]
|
||||
|
|
@ -284,10 +290,13 @@ def main():
|
|||
for install_name, status in download_and_install_item(
|
||||
item, args.install_dir, args.force
|
||||
):
|
||||
print("%s %s" % (install_name, "INSTALLED" if status else "UP-TO-DATE"))
|
||||
print("%s %s" % (install_name,
|
||||
"INSTALLED" if status else "UP-TO-DATE"))
|
||||
|
||||
return 0
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
sys.exit(main())
|
||||
|
||||
# EOF
|
||||
|
|
|
|||
Loading…
Reference in New Issue